1 Department of Allergy and Clinical Immunology, Clínica Universidad de Navarra, Pamplona, Spain.
2 Central Clinical Trials Unit, Research Support Service, Clínica Universidad de Navarra, Pamplona, Spain.
3 Nexkin Medical, Donostia-San Sebastián, Spain.
4 Spanish Research Network on Allergy RD 1600060031 (ARADyAL: Red Nacional de Alergia -Asma, Reacciones Adversas y Alérgicas) of the Carlos III Health Institute, Madrid, Spain.